Electric heater.



No. 729,862. PATENTED JUNE 2, 1903.

J. F. HEWITT & G. W; SPATIG.

ELECTRIC HEATER.

APPLICATION FILED DEC. 30, 1901.

N0 MODEL.

'ut 414mb. v.

UNlTlED "Sterne Patented June 2, 1903.

PATENT (llrrrcs.

J ()SEPH-F. HEWITT AND CHARLES IV. SPATIG, OF ALLEGHENY, PENN- SYLVANIA.

ELECTRIC HEATER- :EPECIFTOATION forming part of Letters Patent No.729,862, dated June 2, 1903.

Application filed DeoemherdO, 1901. semi No. 87.730. (No model.)

To all whom. it ntmy conceive/.-

Beit known that we, JOSEPH F. HEWITTand CHARLES W. SPATIG; citizens ofthe United States, residing at Allegheny, in the county ofAllegheuy andState of Pennsylvania, have invented a new and useful Improvement inElectric Heaters, of which improvement the following is a specification.

This invention relates to certain new and useful improvements inelectric heaters, and relates particularly to such class of heatingdevices as are employed for heating beds and also for various heatingpurposesin any instance where the same may be required.

The invention has for its object to construct a device of this classhaving an insulated core wrapped with wire, the convolutions of the wirebeing wrapped so as not to come in contact with each other, or a coilmay be employed instead of the core, and the coil or core has connectedthereto a plug'for attachment to the ordinary incandescent-lamp socket.

Briefly described, therefore, the invention comprises an apparatusconsisting of a metalliccaseforelectricheatingpurposes. This casecontains a receptacle which is insulated with mica and other material.In this receptacle is placed a resistance-core which heats the case. Alid carrying an insulating-tube covers the coil, and afiexible lamp-cordpasses through the tube and is connected to the coil. The other end ofthe cord is connected to a plug adapted for engagement in anincandescent-lamp socket, and all of this construction will behereinafter more specifically described, and then particularly pointedout in the claim.

In describing the invention in detail reference will be had to theaccompanying draw ings, forming a part of this specification, andwherein like numerals of reference will be employed for designating likeparts througlr out the several views of the drawings, in which- Figure 1is a perspective view of our improved electric heater. Fig. 2 is acentrallongitudinal section thereof. Fig. 3 is a transverse verticalsectional view taken on the line 3 3 of Fig. 2. Fig. 4c is a sideelevation of a modified form of device. Fig. 5 is a transverse verticalsectional view of the same. Fig. (i is a modified form of heating-coil.

To put our in ven-tioninto practice, we pro vide a casing or receptacle1, which may be made of any suitable material readily conductive to heatand may be made inany approved or desired form, a practical form beingthat shown in the illustration, in which the receptacle is shownsubstantially oblong or rectangular in shape with rounded ends. Thisreceptacle is provided with interior partitions 2, which form a box toreceive the iron core or heating-coil 3. This latter is insulated withasbestos 4 or other suitable material which prevents the wire or corefrom coming in contact with the metal and has the feed wire 5 connectedthereto. In practice .it is the intention to connect this feed-wiredirect to an ordinary plug for engagement in the ordinary incandescent-lamp sockets. The core or coil is covered by means of a lid 6, hingedor slidably connected to the upper face of the receptacle and having aninsulated tube or sleeve 6, through which the feed-wire.

is passed. The space within the receptacle surrounding the heating coilor core may be filled with water, as shown, or this space may be leftvacant, and the air contained therein becoming heated will serve thesame purpose as the heated water. It is preferable, though, to providethe receptacle with an inlet 7, so that water may be placed therein whendesired, and this inlet may be normally sealed by means of a screw-cap8.

In Figs. 4 and 5, we show a modified form of construction, in whichthere'ceptacle l is in the form of an inverted 'l", and the heatingcore,as shown, is hollow to allow the water to pass through, this core beingplaced within the inclosing walls 2', as in the preferred 7 form ofconstruction. This form of construction may also be provided with aninlet 7 so as to permit the filling of the receptacle with water. Thishollow core will materially assist in the heating when wateris used.

In Fig. 6 we show another modification, in which we have a series ofpipes connected to= gether and connected to a hollow core. These pipes 8are connected to the core 9, so that water may circulate therethrough.

In the practice of the invention it will be bestos arranged Within saidpartitions, a lid 15 on the top of the receptacle extending over saidcoil, an insulated tube extending through the lid for the reception ofthe feed-Wire, and an inlet in the receptacle.

In testimony whereof We have hereunto 2o signed our namesin the presenceof two subscribing witnesses.

JOSEPH F. HEWITT. CHAS. XV. SPATIG.

In presence of Lotus MOESER, R. S. ABEGYSISTER.

